Car-door jack



July 1, 1930. J. T.YR. CONRAD OAR DOOR J'ACK Filed Feb. 16., 1 929 5Sheets-Sheet l r I Inventor T/hn T.R. Con rad July 1, 193 0. .1. T. 'R.CONRAD 1,768,544

CAR DOOR JACK Filed Fen-16, 192? s Sheetg-Sheet 2 Inventor I O/In T. B.comm! y 1, 9 I I J. T. R. CONRAD 1,758,544

vCAR DOOR JACK Filed Feb. 16, I929 3 SheetsSheet 3 Inventor 1707111 Ti Cn rad Attorngy I Patented July 1, 1930 a if .JOHN T; B. CONRAD, or nnsrCLEVELAND, om

CAB-DOOR JACK Application filed February is," 1929. Serial Thisinvention relates to new and useful improvements in car door jacks andaims to provide a device that is specifically adaptable for use in theopening and closing-of car doors.

5 By reason of the present device railroads will save considerableamount of money owing to the decrease of repaired doors and sides of boxcars caused by forcing doors open and shut with a bar orother tool. 1

An important object of this invention is to provide a car door jack thatcomprises certain elements permanently associated with the two slidedoors of the car as well as other I separate elements adapted forassociation 15 therewith to be manually operated whereby to cause theopening and closing of the doors and this in a relatively easy and rapidmanner. v Furthermore the invention is character- 20 ized-by itssimplicity of construction and inexpensiveness of mZLDIlfaCbUlQ', thedevice consisting of relatively few parts being. so coreof d1'sar-'lated as to reduce the possibility rangeinent to a minimum. e

With th foregoing and otherobjects in view as the nature of theinvention will be better understood, the same comprises the novel form,combination and arrangement of parts hereinafter more fully described,shown in the accompanying drawings and claimed. In the drawings whereinlike reference characters designate corresponding parts throughout theseveral views: i v Figure 1 is a fragmentary side elevationof a box carwherein the adjacent sliding doors are equipped with my improved jack-tofacilitate the proper and rapid opening oft-he doors, 1 v V I Figure 2is a detail longitudinal frag- 'mentarysection through tlie cai'takenabove the device and looking downwardly thereon,

Figure 3 is an enlarged fragmentary elevation of the ad aQent edges ofthe-door and a longitudinal section through the gear box ciation withthe'doors,

Figure 4 is a'vertical section through the: g l

below this gear 14; are oppositely extending V rackbars 15'-l5,'th'einner e 1 gear box of thedevice, y 1

Figure 5c is a longitudinal vertical section illustrated in Figure agear-casing of the devioeyfor more clearly illustrating the constructionof the device and its assotaken substantially upon the line 5+5 of Fig iure e looking inwardly toward the box,

Figure 6 is a perspective of the gear box, the cover unit being removedthrefrom,

Figure '7 is a perspective gear box cover, i

Figure 8 is a top plan view of the'sectional i of the spur gear unitmounted for rotation within the gear box,

\ Figure 9 the rack bars that compris tures of the present inventio,Figure 10 is of a modified is a top sidepe'rspective of one of eessential feafragmentary side. elevation "orm of rack bar, and Figure 11s a front side perspective of one of the tin carrying plate membersassociated with each of the sliding door Now having particular tgenerally a conventional box car while B designates'theusual slidingdoors associatedtherewith.

drawings A designates sof the box car. eference to the In carryingout'the present invention I provide a pair o'fmetallioplates 5- 5adapted to be rigidly secured to theouter sides of the doors B Badjacent theinner said plates being ranged one Adapted to be secured toside of this boxing is a pair 11. The invefitionfurof'cov'er sections 10-10, the adjacent edges of which are edgesthereof, above the other asclearly illustrated in Figuresl and 3.

formed centrally with an as more clearly 7 comprising 7 ar wallof whichis formed centrally with a circular opening 9;

the open front formed intermediate theirupper and lower ends withrounded notches ly illustrated' in Figure 5,

'Extending through 11-1 1, to provide a circular opening of: the coveras more clearthis opening and en tering the opening 9' n' thei'rearwallof the boxing 9 is ashaft 12, thelouter is provided with arelatively wheel13. I Within the casing,

end of which large hand 95 said shaft 12 is r providedfwith a ratchetgear 1 L while longitudinally slid'able' throughgthe casing above anddges thereofgbe- 10c 4o 7 idly associated with the sliding doors of theing provided with rack teeth but have mesh with the ratchet gear 14, seeFigures 3 and 4E.

The ends of these racks bars 1515 adjacent the pin carrying plate 55 arein each instance provided with an eye 16 for loose engagement over theadjacent pin 6 of the respective plate 5 associated with the doors ofthe box car.

Furthermore the opposite ends of said rack bars are provided at theirinner surfaces with stop lugs 17 -17 to limit the movement of the barsthrough the gear casing in their opening direction.

If desired the eyes of said rack bars 15 may be of oval shape asdesignated by the reference character 16 in Figure 10. Obviouslytherefore when'the doors are closed as illustrated in Figure l the rackbars 1515 are suspended outwardly so that the eye end thereof will bedirected toward the gear casing. 1

These eyes of the bar are then arranged over the pins 66 and the wheel13 then rotated obviously causing the movement of the rack bars and thesame general method is employed in closing the doors BB after the boxcar has been loaded.

It will thus be seen that I have provided a novel, simple and usefulmeans for openingand closing the sliding doors of box cars and eventhough I have herein shown and described the invention as consisting ofcertain detail structural elements, it is nevertheless to be understoodthat minor changes may be made therein without affecting the spirit andscope of the appended claims.

Having thus described my invention, what I claim as new is:

1. In a box car jack of the character described, pin members permanentlyand rigbox car, a pair of reversely movable bar members having eyes atone of their ends whereby to facilitate theirdetachable association withsaid door pin and manually controlled means causing the reverse slidingmovement of said bars with respect to each other after they have beenattached to said pins.

of the pins in a manner to detachably mount said rack bars thereon, agear casing through which said rack bars are slidable, a manuallyrotatable rack gear within said casing in operative engagement with therack bars whereby to cause the reverse longitudinal movement of the barswhen said gear is rotated, and an actuating handle connected to thegear.

In testimony whereof I affix my signature.

JOHN T. R. CONRAD.

2. In a detachable box car ack of the character described, a pair ofrectangular anchoring plates having laterally extending pins constructedfor rigid and stationary association with the sliding doors of the boxcar, a pair of reversely movable rigid bars having eyes at one of theirends for the reception of the pins in a manner to detachably mount saidbars on said pins, and means for shifting said bars in reversedirections after same have been mounted on the pins of the anchoringplates.

3. In a detachable box car jack of the'character described, a pair ofpin members adapted for rigid and permanent mounting on the slidingdoors of the box car, a pair of rack bars having eyes at one end for thereception

